2739891 has 32 divisors (see below), whose sum is σ = 4723200. Its totient is φ = 1370880.

The previous prime is 2739881. The next prime is 2739899. The reversal of 2739891 is 1989372.

It is not a de Polignac number, because 2739891 - 2⁵ = 2739859 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 7³ + 3¹⁰ + 9 + 8⁷ + 9⁵ + 1 .

It is not an unprimeable number, because it can be changed into a prime (2739899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6495 + ... + 6903.

It is an arithmetic number, because the mean of its divisors is an integer number (147600).

2^2739891 is an apocalyptic number.

2739891 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2739891 is a deficient number, since it is larger than the sum of its proper divisors (1983309).

2739891 is a wasteful number, since it uses less digits than its factorization.

2739891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459.

The product of its digits is 27216, while the sum is 39.

The square root of 2739891 is about 1655.2616107431. The cubic root of 2739891 is about 139.9300841375.

The spelling of 2739891 in words is "two million, seven hundred thirty-nine thousand, eight hundred ninety-one".